This is a wheelchair ramp that I made recently, for a friend who uses a powered wheelchair. There were a few obstacles to workaround: 1. two air-condition tubes that ran directly under the threshold of the door that needed protection, 2. the floor was somewhat wavy, and 3. clearance for the door of the car that parks next to the ramp. I bolted a piece of 3 x 3 in. angle to the top edge of the ramp, to protect the AC lines. The angle bridged the gap between the ram and the wall, and also protected the AC lines. The ramp was made in three sections, using 1/4" steel plate for the rails, trusses, and leading section, and 1/8" plate for the top surfaces. To compensate for the wavy floor, there are two leveling legs on the top end of the ramp and floor contact is limited to the frame rails on the first section. The parts were sealed using gray epoxy sealer from Eastwood, and finished with Rustoleum machine gray. I used Japan dryer to help speed up the cure time on the top coat. After the ramp was assembled and moved into place, I applied the non-skid material. This was purchased from McMaster-Carr, pn: 7781T17
